I know it's anecdotal, but I've never clicked on an ad in gmail. (to be fair she said that all users will click on 1/4 of the ads presented to them, not '1/4 of users will click on an ad')
Re: "(to be fair she said that all users will click on 1/4 of the ads presented to them, not '1/4 of users will click on an ad')"
That's even worse: she assumed that 4 ads would be presented per e-mail, so the CTR would be 100% per e-mail.
That's beyond absurd.
Yes, indeed. Someone who has a slightest clue about the whole stuff just can't say 1/4 of users will click an ad in Gmail. I am sorry for her, but that is just so off...